So I was looking at the 1986 Pantera catalogue and noticed that, for the 5-string, they included two nuts so you could choose between a low D or a high B. Now, wait, how do either of those make any sense? I guess I can sort of understand the high B, if you wanted to tune it similar to a guitar, but the low D makes no sense at all. Proper tuning would be a low B or a high C. What gives?